@@ -593,10 +593,11 @@
   char *zTitle;
   int rid1, rid2;
   const char *zPageName;
   Manifest *pW1, *pW2 = 0;
   Blob w1, w2, d;
+  int diffFlags;
 
   login_check_credentials();
   rid1 = atoi(PD("a","0"));
   if( !g.perm.History ){ login_needed(); return; }
   if( rid1==0 ) fossil_redirect_home();
@@ -621,14 +622,15 @@
   blob_zero(&w2);
   if( rid2 && (pW2 = manifest_get(rid2, CFTYPE_WIKI))!=0 ){
     blob_init(&w2, pW2->zWiki, -1);
   }
   blob_zero(&d);
-  text_diff(&w2, &w1, &d, 5 | DIFF_IGNORE_EOLWS);
-  @ <pre>
-  @ %h(blob_str(&d))
-  @ </pre>
+  diffFlags = construct_diff_flags(1,0);
+  text_diff(&w2, &w1, &d, diffFlags | DIFF_HTML | DIFF_LINENO);
+  @ <div class="udiff">
+  @ %s(blob_str(&d))
+  @ </div>
   manifest_destroy(pW1);
   manifest_destroy(pW2);
   style_footer();
 }